S
M
T
W
T
F
S
26
55°
41°
27
67°
36°
28
56°
47°
29
56°
44°
30
45°
33°
1
47°
29°
2
43°
31°
3
57°
27°
4
69°
40°
5
71°
58°
6
58°
42°
7
57°
32°
8
57°
35°
9
61°
45°
10
61°
40°
11
60°
34°
12
64°
29°
13
65°
43°
14
44°
40°
15
64°
41°
16
72°
44°
17
80°
60°
18
85°
60°
19
81°
67°
20
70°
49°
21
60°
47°
22
60°
45°
23
49°
46°
24
65°
58°
25
73°
59°
26
75°
54°
27
78°
52°
28
74°
48°
29
72°
52°
30
73°
54°
31
75°
54°
1
77°
53°
2
75°
51°
3
73°
49°
4
76°
54°
5
77°
55°
6
77°
54°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Bethlehem
Bethlehem's May 2026 forecast shows daily high temperatures ranging from 49° to 78°, with overnight lows between 45° and 59°. The average high for May is 71° with an average low of 52°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how May weather will actually feel in Bethlehem. See also: June | July | August.
